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Characterization of patients with recurrent ischaemic stroke using the ASCO classification
M E Wolf1, T Sauer, M G Hennerici
1Department of Neurology, Universitaetsmedizin Mannheim, University of Heidelberg, Mannheim, Germany. wolf@neuro.ma.uni-heidelberg.de
Insights
The etiology of recurrent ischemic stroke can change, with cardioembolism increasingly prevalent and often undertreated. The ASCO score effectively monitors evolving risk factors in stroke patients.
Area of Science:
- Neurology
- Cardiology
- Vascular Medicine
Background:
- The ASCO score aids in comprehensively characterizing ischemic stroke patients and their risk factors.
- It categorizes stroke etiologies into atherosclerotic changes (A), small vessel disease (S), cardiac sources (C), and other (O).
- The score may help identify patterns in recurrent ischemic stroke and evolving risk factor constellations.
Purpose of the Study:
- To analyze the distribution and changes in etiologies of recurrent ischemic stroke using the ASCO score.
- To document the evolution of risk factor constellations in patients experiencing recurrent ischemic strokes.
Main Methods:
- Prospective screening of a stroke database for recurrent ischemic stroke patients (2004-2011).
- Classification of each stroke event using the ASCO score.
- Analysis of etiology distribution and documentation of ASCO score modifications for each patient.
Main Results:
- 131 patients with recurrent ischemic stroke were identified.
- Significant modifications in ASCO score components were observed in 64.9% of patients.
- At recurrence, there was an increased prevalence of cardioembolic sources (grade 1) compared to the initial event.
Conclusions:
- The etiology of recurrent ischemic stroke is not always consistent with prior events.
- An increasing prevalence of cardioembolism, often inadequately treated, was a key finding at stroke recurrence.
- The ASCO score is a valuable tool for monitoring risk factor constellations in patients with recurrent ischemic stroke.
Background And Purpose:
The ASCO score has the advantage of allowing a more comprehensive characterization of ischaemic stroke patients and their risk factors, as reflected in different grades of evidence of atherosclerotic changes (A), small vessel disease (S), potential cardiac (C) or other (O) sources. It might also help to characterize patients with recurrent ischaemic stroke and document the etiology of stroke recurrence as well as the further development of risk factor constellations.
Methods:
We prospectively screened our stroke database for patients with recurrent ischaemic stroke between 2004 and 2011, and classified each stroke using ASCO. The distribution of etiologies was analysed, and changes in the ASCO score were documented for each patient.
Results:
We identified 131 patients with recurrence of ischaemic stroke. At the first event, the distribution of etiologies and their grade of evidence was 97 grade 1 (A = 18/S = 32/C = 44/O = 3), six grade 2 (A = 2/S = 1/C = 3/O = 0), 199 grade 3 (A = 85/S = 83/C = 23/O = 8), 204 grade 0 (A = 26/S = 14/C = 44/O = 120) and 18 grade 9 (A = 0/S = 1/C = 17/O = 0). At stroke recurrence, 98 grade 1 (A = 16/S = 24/C = 55/O = 3), 11 grade 2 (A = 2/S = 5/C = 4/O = 0), 210 grade 3 (A = 94/S = 92/C = 13/O = 11), 171 grade 0 (A = 16/S = 9/C = 26/O = 117) and 34 grade 9 (A = 0/S = 1/C = 33/O = 0) were identified. Analysis of each individual showed a modification of the score in 85 patients (64.9%).
Conclusions:
Recurrent ischaemic stroke does not always have the same etiology as the previous one(s). Among variable changes of grade 1 etiologies, an increasing prevalence of cardioembolism--often insufficiently treated--at stroke recurrence was a major finding. ASCO proved to be highly useful to monitor risk factor constellations.
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